Mercurial > hg > truffle
annotate src/share/vm/c1/c1_CodeStubs.hpp @ 12160:f98f5d48f511
7199175: JSR 292: C1 needs patching when invokedynamic/invokehandle call site is not linked
Summary: Do patching rather bailing out for unlinked call with appendix
Reviewed-by: twisti, kvn
| author | roland |
|---|---|
| date | Wed, 21 Aug 2013 13:34:45 +0200 |
| parents | 46f6f063b272 |
| children | de6a9e811145 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_C1_C1_CODESTUBS_HPP |
| 26 #define SHARE_VM_C1_C1_CODESTUBS_HPP | |
| 27 | |
| 28 #include "c1/c1_FrameMap.hpp" | |
| 29 #include "c1/c1_IR.hpp" | |
| 30 #include "c1/c1_Instruction.hpp" | |
| 31 #include "c1/c1_LIR.hpp" | |
| 32 #include "c1/c1_Runtime1.hpp" | |
| 33 #include "utilities/array.hpp" | |
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34 #include "utilities/macros.hpp" |
| 1972 | 35 |
| 0 | 36 class CodeEmitInfo; |
| 37 class LIR_Assembler; | |
| 38 class LIR_OpVisitState; | |
| 39 | |
| 40 // CodeStubs are little 'out-of-line' pieces of code that | |
| 41 // usually handle slow cases of operations. All code stubs | |
| 42 // are collected and code is emitted at the end of the | |
| 43 // nmethod. | |
| 44 | |
| 45 class CodeStub: public CompilationResourceObj { | |
| 46 protected: | |
| 47 Label _entry; // label at the stub entry point | |
| 48 Label _continuation; // label where stub continues, if any | |
| 49 | |
| 50 public: | |
| 51 CodeStub() {} | |
| 52 | |
| 53 // code generation | |
| 54 void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); } | |
| 55 virtual void emit_code(LIR_Assembler* e) = 0; | |
| 56 virtual CodeEmitInfo* info() const { return NULL; } | |
| 57 virtual bool is_exception_throw_stub() const { return false; } | |
| 58 virtual bool is_range_check_stub() const { return false; } | |
| 59 virtual bool is_divbyzero_stub() const { return false; } | |
| 60 #ifndef PRODUCT | |
| 61 virtual void print_name(outputStream* out) const = 0; | |
| 62 #endif | |
| 63 | |
| 64 // label access | |
| 65 Label* entry() { return &_entry; } | |
| 66 Label* continuation() { return &_continuation; } | |
| 67 // for LIR | |
| 68 virtual void visit(LIR_OpVisitState* visit) { | |
| 69 #ifndef PRODUCT | |
| 70 if (LIRTracePeephole && Verbose) { | |
| 71 tty->print("no visitor for "); | |
| 72 print_name(tty); | |
| 73 tty->cr(); | |
| 74 } | |
| 75 #endif | |
| 76 } | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 define_array(CodeStubArray, CodeStub*) | |
| 81 define_stack(_CodeStubList, CodeStubArray) | |
| 82 | |
| 83 class CodeStubList: public _CodeStubList { | |
| 84 public: | |
| 85 CodeStubList(): _CodeStubList() {} | |
| 86 | |
| 87 void append(CodeStub* stub) { | |
| 88 if (!contains(stub)) { | |
| 89 _CodeStubList::append(stub); | |
| 90 } | |
| 91 } | |
| 92 }; | |
| 93 | |
| 94 class CounterOverflowStub: public CodeStub { | |
| 95 private: | |
| 96 CodeEmitInfo* _info; | |
| 97 int _bci; | |
| 1783 | 98 LIR_Opr _method; |
| 0 | 99 |
| 100 public: | |
| 1783 | 101 CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) : _info(info), _bci(bci), _method(method) { |
| 0 | 102 } |
| 103 | |
| 104 virtual void emit_code(LIR_Assembler* e); | |
| 105 | |
| 106 virtual void visit(LIR_OpVisitState* visitor) { | |
| 107 visitor->do_slow_case(_info); | |
| 1783 | 108 visitor->do_input(_method); |
| 0 | 109 } |
| 110 | |
| 111 #ifndef PRODUCT | |
| 112 virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); } | |
| 113 #endif // PRODUCT | |
| 114 | |
| 115 }; | |
| 116 | |
| 117 class ConversionStub: public CodeStub { | |
| 118 private: | |
| 119 Bytecodes::Code _bytecode; | |
| 120 LIR_Opr _input; | |
| 121 LIR_Opr _result; | |
| 122 | |
| 123 static float float_zero; | |
| 124 static double double_zero; | |
| 125 public: | |
| 126 ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result) | |
| 127 : _bytecode(bytecode), _input(input), _result(result) { | |
| 128 } | |
| 129 | |
| 130 Bytecodes::Code bytecode() { return _bytecode; } | |
| 131 LIR_Opr input() { return _input; } | |
| 132 LIR_Opr result() { return _result; } | |
| 133 | |
| 134 virtual void emit_code(LIR_Assembler* e); | |
| 135 virtual void visit(LIR_OpVisitState* visitor) { | |
| 136 visitor->do_slow_case(); | |
| 137 visitor->do_input(_input); | |
| 138 visitor->do_output(_result); | |
| 139 } | |
| 140 #ifndef PRODUCT | |
| 141 virtual void print_name(outputStream* out) const { out->print("ConversionStub"); } | |
| 142 #endif // PRODUCT | |
| 143 }; | |
| 144 | |
| 145 | |
| 146 // Throws ArrayIndexOutOfBoundsException by default but can be | |
| 147 // configured to throw IndexOutOfBoundsException in constructor | |
| 148 class RangeCheckStub: public CodeStub { | |
| 149 private: | |
| 150 CodeEmitInfo* _info; | |
| 151 LIR_Opr _index; | |
| 152 bool _throw_index_out_of_bounds_exception; | |
| 153 | |
| 154 public: | |
| 155 RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false); | |
| 156 virtual void emit_code(LIR_Assembler* e); | |
| 157 virtual CodeEmitInfo* info() const { return _info; } | |
| 158 virtual bool is_exception_throw_stub() const { return true; } | |
| 159 virtual bool is_range_check_stub() const { return true; } | |
| 160 virtual void visit(LIR_OpVisitState* visitor) { | |
| 161 visitor->do_slow_case(_info); | |
| 162 visitor->do_input(_index); | |
| 163 } | |
| 164 #ifndef PRODUCT | |
| 165 virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); } | |
| 166 #endif // PRODUCT | |
| 167 }; | |
| 168 | |
| 8860 | 169 // stub used when predicate fails and deoptimization is needed |
| 170 class PredicateFailedStub: public CodeStub { | |
| 171 private: | |
| 172 CodeEmitInfo* _info; | |
| 173 | |
| 174 public: | |
| 175 PredicateFailedStub(CodeEmitInfo* info); | |
| 176 virtual void emit_code(LIR_Assembler* e); | |
| 177 virtual CodeEmitInfo* info() const { return _info; } | |
| 178 virtual void visit(LIR_OpVisitState* visitor) { | |
| 179 visitor->do_slow_case(_info); | |
| 180 } | |
| 181 #ifndef PRODUCT | |
| 182 virtual void print_name(outputStream* out) const { out->print("PredicateFailedStub"); } | |
| 183 #endif // PRODUCT | |
| 184 }; | |
| 0 | 185 |
| 186 class DivByZeroStub: public CodeStub { | |
| 187 private: | |
| 188 CodeEmitInfo* _info; | |
| 189 int _offset; | |
| 190 | |
| 191 public: | |
| 192 DivByZeroStub(CodeEmitInfo* info) | |
| 193 : _info(info), _offset(-1) { | |
| 194 } | |
| 195 DivByZeroStub(int offset, CodeEmitInfo* info) | |
| 196 : _info(info), _offset(offset) { | |
| 197 } | |
| 198 virtual void emit_code(LIR_Assembler* e); | |
| 199 virtual CodeEmitInfo* info() const { return _info; } | |
| 200 virtual bool is_exception_throw_stub() const { return true; } | |
| 201 virtual bool is_divbyzero_stub() const { return true; } | |
| 202 virtual void visit(LIR_OpVisitState* visitor) { | |
| 203 visitor->do_slow_case(_info); | |
| 204 } | |
| 205 #ifndef PRODUCT | |
| 206 virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); } | |
| 207 #endif // PRODUCT | |
| 208 }; | |
| 209 | |
| 210 | |
| 211 class ImplicitNullCheckStub: public CodeStub { | |
| 212 private: | |
| 213 CodeEmitInfo* _info; | |
| 214 int _offset; | |
| 215 | |
| 216 public: | |
| 217 ImplicitNullCheckStub(int offset, CodeEmitInfo* info) | |
| 218 : _offset(offset), _info(info) { | |
| 219 } | |
| 220 virtual void emit_code(LIR_Assembler* e); | |
| 221 virtual CodeEmitInfo* info() const { return _info; } | |
| 222 virtual bool is_exception_throw_stub() const { return true; } | |
| 223 virtual void visit(LIR_OpVisitState* visitor) { | |
| 224 visitor->do_slow_case(_info); | |
| 225 } | |
| 226 #ifndef PRODUCT | |
| 227 virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); } | |
| 228 #endif // PRODUCT | |
| 229 }; | |
| 230 | |
| 231 | |
| 232 class NewInstanceStub: public CodeStub { | |
| 233 private: | |
| 234 ciInstanceKlass* _klass; | |
| 235 LIR_Opr _klass_reg; | |
| 236 LIR_Opr _result; | |
| 237 CodeEmitInfo* _info; | |
| 238 Runtime1::StubID _stub_id; | |
| 239 | |
| 240 public: | |
| 241 NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id); | |
| 242 virtual void emit_code(LIR_Assembler* e); | |
| 243 virtual CodeEmitInfo* info() const { return _info; } | |
| 244 virtual void visit(LIR_OpVisitState* visitor) { | |
| 245 visitor->do_slow_case(_info); | |
| 246 visitor->do_input(_klass_reg); | |
| 247 visitor->do_output(_result); | |
| 248 } | |
| 249 #ifndef PRODUCT | |
| 250 virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); } | |
| 251 #endif // PRODUCT | |
| 252 }; | |
| 253 | |
| 254 | |
| 255 class NewTypeArrayStub: public CodeStub { | |
| 256 private: | |
| 257 LIR_Opr _klass_reg; | |
| 258 LIR_Opr _length; | |
| 259 LIR_Opr _result; | |
| 260 CodeEmitInfo* _info; | |
| 261 | |
| 262 public: | |
| 263 NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
| 264 virtual void emit_code(LIR_Assembler* e); | |
| 265 virtual CodeEmitInfo* info() const { return _info; } | |
| 266 virtual void visit(LIR_OpVisitState* visitor) { | |
| 267 visitor->do_slow_case(_info); | |
| 268 visitor->do_input(_klass_reg); | |
| 269 visitor->do_input(_length); | |
| 270 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
| 271 } | |
| 272 #ifndef PRODUCT | |
| 273 virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); } | |
| 274 #endif // PRODUCT | |
| 275 }; | |
| 276 | |
| 277 | |
| 278 class NewObjectArrayStub: public CodeStub { | |
| 279 private: | |
| 280 LIR_Opr _klass_reg; | |
| 281 LIR_Opr _length; | |
| 282 LIR_Opr _result; | |
| 283 CodeEmitInfo* _info; | |
| 284 | |
| 285 public: | |
| 286 NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
| 287 virtual void emit_code(LIR_Assembler* e); | |
| 288 virtual CodeEmitInfo* info() const { return _info; } | |
| 289 virtual void visit(LIR_OpVisitState* visitor) { | |
| 290 visitor->do_slow_case(_info); | |
| 291 visitor->do_input(_klass_reg); | |
| 292 visitor->do_input(_length); | |
| 293 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
| 294 } | |
| 295 #ifndef PRODUCT | |
| 296 virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); } | |
| 297 #endif // PRODUCT | |
| 298 }; | |
| 299 | |
| 300 | |
| 301 class MonitorAccessStub: public CodeStub { | |
| 302 protected: | |
| 303 LIR_Opr _obj_reg; | |
| 304 LIR_Opr _lock_reg; | |
| 305 | |
| 306 public: | |
| 307 MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) { | |
| 308 _obj_reg = obj_reg; | |
| 309 _lock_reg = lock_reg; | |
| 310 } | |
| 311 | |
| 312 #ifndef PRODUCT | |
| 313 virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); } | |
| 314 #endif // PRODUCT | |
| 315 }; | |
| 316 | |
| 317 | |
| 318 class MonitorEnterStub: public MonitorAccessStub { | |
| 319 private: | |
| 320 CodeEmitInfo* _info; | |
| 321 | |
| 322 public: | |
| 323 MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info); | |
| 324 | |
| 325 virtual void emit_code(LIR_Assembler* e); | |
| 326 virtual CodeEmitInfo* info() const { return _info; } | |
| 327 virtual void visit(LIR_OpVisitState* visitor) { | |
| 328 visitor->do_input(_obj_reg); | |
| 329 visitor->do_input(_lock_reg); | |
| 330 visitor->do_slow_case(_info); | |
| 331 } | |
| 332 #ifndef PRODUCT | |
| 333 virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); } | |
| 334 #endif // PRODUCT | |
| 335 }; | |
| 336 | |
| 337 | |
| 338 class MonitorExitStub: public MonitorAccessStub { | |
| 339 private: | |
| 340 bool _compute_lock; | |
| 341 int _monitor_ix; | |
| 342 | |
| 343 public: | |
| 344 MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix) | |
| 345 : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg), | |
| 346 _compute_lock(compute_lock), _monitor_ix(monitor_ix) { } | |
| 347 virtual void emit_code(LIR_Assembler* e); | |
| 348 virtual void visit(LIR_OpVisitState* visitor) { | |
| 349 assert(_obj_reg->is_illegal(), "unused"); | |
| 350 if (_compute_lock) { | |
| 351 visitor->do_temp(_lock_reg); | |
| 352 } else { | |
| 353 visitor->do_input(_lock_reg); | |
| 354 } | |
| 355 } | |
| 356 #ifndef PRODUCT | |
| 357 virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); } | |
| 358 #endif // PRODUCT | |
| 359 }; | |
| 360 | |
| 361 | |
| 362 class PatchingStub: public CodeStub { | |
| 363 public: | |
| 364 enum PatchID { | |
| 365 access_field_id, | |
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366 load_klass_id, |
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367 load_mirror_id, |
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368 load_appendix_id |
| 0 | 369 }; |
| 370 enum constants { | |
| 371 patch_info_size = 3 | |
| 372 }; | |
| 373 private: | |
| 374 PatchID _id; | |
| 375 address _pc_start; | |
| 376 int _bytes_to_copy; | |
| 377 Label _patched_code_entry; | |
| 378 Label _patch_site_entry; | |
| 379 Label _patch_site_continuation; | |
| 380 Register _obj; | |
| 381 CodeEmitInfo* _info; | |
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382 int _index; // index of the patchable oop or Klass* in nmethod oop or metadata table if needed |
| 0 | 383 static int _patch_info_offset; |
| 384 | |
| 385 void align_patch_site(MacroAssembler* masm); | |
| 386 | |
| 387 public: | |
| 388 static int patch_info_offset() { return _patch_info_offset; } | |
| 389 | |
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390 PatchingStub(MacroAssembler* masm, PatchID id, int index = -1): |
| 0 | 391 _id(id) |
| 392 , _info(NULL) | |
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393 , _index(index) { |
| 0 | 394 if (os::is_MP()) { |
| 395 // force alignment of patch sites on MP hardware so we | |
| 396 // can guarantee atomic writes to the patch site. | |
| 397 align_patch_site(masm); | |
| 398 } | |
| 399 _pc_start = masm->pc(); | |
| 400 masm->bind(_patch_site_entry); | |
| 401 } | |
| 402 | |
| 403 void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) { | |
| 404 _info = info; | |
| 405 _obj = obj; | |
| 406 masm->bind(_patch_site_continuation); | |
| 407 _bytes_to_copy = masm->pc() - pc_start(); | |
| 408 if (_id == PatchingStub::access_field_id) { | |
| 409 // embed a fixed offset to handle long patches which need to be offset by a word. | |
| 410 // the patching code will just add the field offset field to this offset so | |
| 411 // that we can refernce either the high or low word of a double word field. | |
| 412 int field_offset = 0; | |
| 413 switch (patch_code) { | |
| 414 case lir_patch_low: field_offset = lo_word_offset_in_bytes; break; | |
| 415 case lir_patch_high: field_offset = hi_word_offset_in_bytes; break; | |
| 416 case lir_patch_normal: field_offset = 0; break; | |
| 417 default: ShouldNotReachHere(); | |
| 418 } | |
| 419 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start()); | |
| 420 n_move->set_offset(field_offset); | |
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421 } else if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { |
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422 assert(_obj != noreg, "must have register object for load_klass/load_mirror"); |
| 0 | 423 #ifdef ASSERT |
| 424 // verify that we're pointing at a NativeMovConstReg | |
| 425 nativeMovConstReg_at(pc_start()); | |
| 426 #endif | |
| 427 } else { | |
| 428 ShouldNotReachHere(); | |
| 429 } | |
| 430 assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes"); | |
| 431 } | |
| 432 | |
| 433 address pc_start() const { return _pc_start; } | |
| 434 PatchID id() const { return _id; } | |
| 435 | |
| 436 virtual void emit_code(LIR_Assembler* e); | |
| 437 virtual CodeEmitInfo* info() const { return _info; } | |
| 438 virtual void visit(LIR_OpVisitState* visitor) { | |
| 439 visitor->do_slow_case(_info); | |
| 440 } | |
| 441 #ifndef PRODUCT | |
| 442 virtual void print_name(outputStream* out) const { out->print("PatchingStub"); } | |
| 443 #endif // PRODUCT | |
| 444 }; | |
| 445 | |
| 446 | |
| 1295 | 447 //------------------------------------------------------------------------------ |
| 448 // DeoptimizeStub | |
| 449 // | |
| 450 class DeoptimizeStub : public CodeStub { | |
| 451 private: | |
| 452 CodeEmitInfo* _info; | |
| 453 | |
| 454 public: | |
| 455 DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {} | |
| 456 | |
| 457 virtual void emit_code(LIR_Assembler* e); | |
| 458 virtual CodeEmitInfo* info() const { return _info; } | |
| 459 virtual bool is_exception_throw_stub() const { return true; } | |
| 460 virtual void visit(LIR_OpVisitState* visitor) { | |
| 461 visitor->do_slow_case(_info); | |
| 462 } | |
| 463 #ifndef PRODUCT | |
| 464 virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); } | |
| 465 #endif // PRODUCT | |
| 466 }; | |
| 467 | |
| 468 | |
| 0 | 469 class SimpleExceptionStub: public CodeStub { |
| 470 private: | |
| 471 LIR_Opr _obj; | |
| 472 Runtime1::StubID _stub; | |
| 473 CodeEmitInfo* _info; | |
| 474 | |
| 475 public: | |
| 476 SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info): | |
| 477 _obj(obj), _info(info), _stub(stub) { | |
| 478 } | |
| 479 | |
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480 void set_obj(LIR_Opr obj) { |
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481 _obj = obj; |
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482 } |
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483 |
| 0 | 484 virtual void emit_code(LIR_Assembler* e); |
| 485 virtual CodeEmitInfo* info() const { return _info; } | |
| 486 virtual bool is_exception_throw_stub() const { return true; } | |
| 487 virtual void visit(LIR_OpVisitState* visitor) { | |
| 488 if (_obj->is_valid()) visitor->do_input(_obj); | |
| 489 visitor->do_slow_case(_info); | |
| 490 } | |
| 491 #ifndef PRODUCT | |
| 492 virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); } | |
| 493 #endif // PRODUCT | |
| 494 }; | |
| 495 | |
| 496 | |
| 497 | |
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498 class ArrayStoreExceptionStub: public SimpleExceptionStub { |
| 0 | 499 private: |
| 500 CodeEmitInfo* _info; | |
| 501 | |
| 502 public: | |
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503 ArrayStoreExceptionStub(LIR_Opr obj, CodeEmitInfo* info): SimpleExceptionStub(Runtime1::throw_array_store_exception_id, obj, info) {} |
| 0 | 504 #ifndef PRODUCT |
| 505 virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); } | |
| 506 #endif // PRODUCT | |
| 507 }; | |
| 508 | |
| 509 | |
| 510 class ArrayCopyStub: public CodeStub { | |
| 511 private: | |
| 512 LIR_OpArrayCopy* _op; | |
| 513 | |
| 514 public: | |
| 515 ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { } | |
| 516 | |
| 517 LIR_Opr src() const { return _op->src(); } | |
| 518 LIR_Opr src_pos() const { return _op->src_pos(); } | |
| 519 LIR_Opr dst() const { return _op->dst(); } | |
| 520 LIR_Opr dst_pos() const { return _op->dst_pos(); } | |
| 521 LIR_Opr length() const { return _op->length(); } | |
| 522 LIR_Opr tmp() const { return _op->tmp(); } | |
| 523 | |
| 524 virtual void emit_code(LIR_Assembler* e); | |
| 525 virtual CodeEmitInfo* info() const { return _op->info(); } | |
| 526 virtual void visit(LIR_OpVisitState* visitor) { | |
| 527 // don't pass in the code emit info since it's processed in the fast path | |
| 528 visitor->do_slow_case(); | |
| 529 } | |
| 530 #ifndef PRODUCT | |
| 531 virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); } | |
| 532 #endif // PRODUCT | |
| 533 }; | |
| 342 | 534 |
| 535 ////////////////////////////////////////////////////////////////////////////////////////// | |
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536 #if INCLUDE_ALL_GCS |
| 342 | 537 |
| 538 // Code stubs for Garbage-First barriers. | |
| 539 class G1PreBarrierStub: public CodeStub { | |
| 540 private: | |
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541 bool _do_load; |
| 342 | 542 LIR_Opr _addr; |
| 543 LIR_Opr _pre_val; | |
| 544 LIR_PatchCode _patch_code; | |
| 545 CodeEmitInfo* _info; | |
| 546 | |
| 547 public: | |
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548 // Version that _does_ generate a load of the previous value from addr. |
| 342 | 549 // addr (the address of the field to be read) must be a LIR_Address |
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550 // pre_val (a temporary register) must be a register; |
| 342 | 551 G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) : |
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552 _addr(addr), _pre_val(pre_val), _do_load(true), |
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553 _patch_code(patch_code), _info(info) |
| 342 | 554 { |
| 555 assert(_pre_val->is_register(), "should be temporary register"); | |
| 556 assert(_addr->is_address(), "should be the address of the field"); | |
| 557 } | |
| 558 | |
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559 // Version that _does not_ generate load of the previous value; the |
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560 // previous value is assumed to have already been loaded into pre_val. |
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561 G1PreBarrierStub(LIR_Opr pre_val) : |
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562 _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false), |
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563 _patch_code(lir_patch_none), _info(NULL) |
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564 { |
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565 assert(_pre_val->is_register(), "should be a register"); |
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566 } |
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567 |
| 342 | 568 LIR_Opr addr() const { return _addr; } |
| 569 LIR_Opr pre_val() const { return _pre_val; } | |
| 570 LIR_PatchCode patch_code() const { return _patch_code; } | |
| 571 CodeEmitInfo* info() const { return _info; } | |
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572 bool do_load() const { return _do_load; } |
| 342 | 573 |
| 574 virtual void emit_code(LIR_Assembler* e); | |
| 575 virtual void visit(LIR_OpVisitState* visitor) { | |
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576 if (_do_load) { |
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577 // don't pass in the code emit info since it's processed in the fast |
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578 // path |
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579 if (_info != NULL) |
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580 visitor->do_slow_case(_info); |
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581 else |
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582 visitor->do_slow_case(); |
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583 |
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584 visitor->do_input(_addr); |
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585 visitor->do_temp(_pre_val); |
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586 } else { |
| 342 | 587 visitor->do_slow_case(); |
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588 visitor->do_input(_pre_val); |
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589 } |
| 342 | 590 } |
| 591 #ifndef PRODUCT | |
| 592 virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); } | |
| 593 #endif // PRODUCT | |
| 594 }; | |
| 595 | |
| 596 class G1PostBarrierStub: public CodeStub { | |
| 597 private: | |
| 598 LIR_Opr _addr; | |
| 599 LIR_Opr _new_val; | |
| 600 | |
| 601 static jbyte* _byte_map_base; | |
| 602 static jbyte* byte_map_base_slow(); | |
| 603 static jbyte* byte_map_base() { | |
| 604 if (_byte_map_base == NULL) { | |
| 605 _byte_map_base = byte_map_base_slow(); | |
| 606 } | |
| 607 return _byte_map_base; | |
| 608 } | |
| 609 | |
| 610 public: | |
| 611 // addr (the address of the object head) and new_val must be registers. | |
| 612 G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { } | |
| 613 | |
| 614 LIR_Opr addr() const { return _addr; } | |
| 615 LIR_Opr new_val() const { return _new_val; } | |
| 616 | |
| 617 virtual void emit_code(LIR_Assembler* e); | |
| 618 virtual void visit(LIR_OpVisitState* visitor) { | |
| 619 // don't pass in the code emit info since it's processed in the fast path | |
| 620 visitor->do_slow_case(); | |
| 621 visitor->do_input(_addr); | |
| 622 visitor->do_input(_new_val); | |
| 623 } | |
| 624 #ifndef PRODUCT | |
| 625 virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); } | |
| 626 #endif // PRODUCT | |
| 627 }; | |
| 628 | |
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629 #endif // INCLUDE_ALL_GCS |
| 342 | 630 ////////////////////////////////////////////////////////////////////////////////////////// |
| 1972 | 631 |
| 632 #endif // SHARE_VM_C1_C1_CODESTUBS_HPP |